The first significant wave of these campaigns was during the 1930s.

A significant wave of Christian immigration to the city begins.

But, the first significant wave of German immigration was in 1838.

Other significant waves were those of 1914, consisting of 4,512 people, and 1907-09, which numbered 2,529.

Chinese began inhabiting Indonesia since 15th century with significant waves in 18th and 19th century.

A significant tropical wave with very little deep convection left Africa on July 22.

Another significant wave followed in the 1950s which mainly included students and professionals.

The first significant wave of United States emigrants arrived in 1842.

Nearly 20 years ago, I was told, the crusty, proprietary farmers admitted a first significant wave of foreigners.

There were two other significant waves of immigration at the end the 19th century.